Ubuntu update for linux



Risk Low
Patch available YES
Number of vulnerabilities 10
CVE-ID CVE-2020-25669
CVE-2020-27815
CVE-2020-27830
CVE-2020-28941
CVE-2020-29374
CVE-2020-29568
CVE-2020-29569
CVE-2020-29660
CVE-2020-29661
CWE-ID CWE-416
CWE-125
CWE-476
CWE-763
CWE-362
CWE-119
CWE-252
CWE-667
Exploitation vector Local
Public exploit Public exploit code for vulnerability #10 is available.
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

linux-image-azure (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.15.0-1108-azure (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-virtual-hwe-16.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-oem (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-lowlatency-hwe-16.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-generic-lpae-hwe-16.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-generic-hwe-16.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.15.0-136-lowlatency (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.15.0-136-generic-lpae (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.15.0-136-generic (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-oracle (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-gke (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-gcp (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-aws-hwe (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.15.0-1094-aws (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.15.0-1093-gcp (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.15.0-1065-oracle (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-virtual (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-snapdragon (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-raspi2 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-oracle-lts-18.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-lowlatency (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-kvm (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-gke-4.15 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-generic-lpae (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-generic (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-gcp-lts-18.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-dell300x (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-azure-lts-18.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-aws-lts-18.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.15.0-1096-snapdragon (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.15.0-1085-kvm (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.15.0-1079-raspi2 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.15.0-1079-gke (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-4.15.0-1012-dell300x (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 10 vulnerabilities.

1) Use after free

EUVDB-ID: #VU92762

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-25669

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code.

A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 18.04

linux-image-azure (Ubuntu package): before 4.15.0.1108.81

linux-image-4.15.0-1108-azure (Ubuntu package): before 4.15.0-1108.120~14.04.1

linux-image-virtual-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-oem (Ubuntu package): before 4.15.0.136.132

linux-image-lowlatency-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-lpae-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-4.15.0-136-lowlatency (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic-lpae (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-oracle (Ubuntu package): before 4.15.0.1065.53

linux-image-gke (Ubuntu package): before 4.15.0.1079.83

linux-image-gcp (Ubuntu package): before 4.15.0.1093.94

linux-image-aws-hwe (Ubuntu package): before 4.15.0.1094.87

linux-image-4.15.0-1094-aws (Ubuntu package): before 4.15.0-1094.101~16.04.1

linux-image-4.15.0-1093-gcp (Ubuntu package): before 4.15.0-1093.106~16.04.1

linux-image-4.15.0-1065-oracle (Ubuntu package): before 4.15.0-1065.73~16.04.1

linux-image-virtual (Ubuntu package): before 4.15.0.136.123

linux-image-snapdragon (Ubuntu package): before 4.15.0.1096.99

linux-image-raspi2 (Ubuntu package): before 4.15.0.1079.76

linux-image-oracle-lts-18.04 (Ubuntu package): before 4.15.0.1065.75

linux-image-lowlatency (Ubuntu package): before 4.15.0.136.123

linux-image-kvm (Ubuntu package): before 4.15.0.1085.81

linux-image-gke-4.15 (Ubuntu package): before 4.15.0.1079.83

linux-image-generic-lpae (Ubuntu package): before 4.15.0.136.123

linux-image-generic (Ubuntu package): before 4.15.0.136.123

linux-image-gcp-lts-18.04 (Ubuntu package): before 4.15.0.1093.111

linux-image-dell300x (Ubuntu package): before 4.15.0.1012.14

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1108.81

linux-image-aws-lts-18.04 (Ubuntu package): before 4.15.0.1094.97

linux-image-4.15.0-1096-snapdragon (Ubuntu package): before 4.15.0-1096.105

linux-image-4.15.0-1085-kvm (Ubuntu package): before 4.15.0-1085.87

linux-image-4.15.0-1079-raspi2 (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1079-gke (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1012-dell300x (Ubuntu package): before 4.15.0-1012.16

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4749-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Out-of-bounds read

EUVDB-ID: #VU49169

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-27815

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition in fs/jfs/jfs_dmap.c. A local user can trigger out-of-bounds read error and crash the kernel.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 18.04

linux-image-azure (Ubuntu package): before 4.15.0.1108.81

linux-image-4.15.0-1108-azure (Ubuntu package): before 4.15.0-1108.120~14.04.1

linux-image-virtual-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-oem (Ubuntu package): before 4.15.0.136.132

linux-image-lowlatency-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-lpae-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-4.15.0-136-lowlatency (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic-lpae (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-oracle (Ubuntu package): before 4.15.0.1065.53

linux-image-gke (Ubuntu package): before 4.15.0.1079.83

linux-image-gcp (Ubuntu package): before 4.15.0.1093.94

linux-image-aws-hwe (Ubuntu package): before 4.15.0.1094.87

linux-image-4.15.0-1094-aws (Ubuntu package): before 4.15.0-1094.101~16.04.1

linux-image-4.15.0-1093-gcp (Ubuntu package): before 4.15.0-1093.106~16.04.1

linux-image-4.15.0-1065-oracle (Ubuntu package): before 4.15.0-1065.73~16.04.1

linux-image-virtual (Ubuntu package): before 4.15.0.136.123

linux-image-snapdragon (Ubuntu package): before 4.15.0.1096.99

linux-image-raspi2 (Ubuntu package): before 4.15.0.1079.76

linux-image-oracle-lts-18.04 (Ubuntu package): before 4.15.0.1065.75

linux-image-lowlatency (Ubuntu package): before 4.15.0.136.123

linux-image-kvm (Ubuntu package): before 4.15.0.1085.81

linux-image-gke-4.15 (Ubuntu package): before 4.15.0.1079.83

linux-image-generic-lpae (Ubuntu package): before 4.15.0.136.123

linux-image-generic (Ubuntu package): before 4.15.0.136.123

linux-image-gcp-lts-18.04 (Ubuntu package): before 4.15.0.1093.111

linux-image-dell300x (Ubuntu package): before 4.15.0.1012.14

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1108.81

linux-image-aws-lts-18.04 (Ubuntu package): before 4.15.0.1094.97

linux-image-4.15.0-1096-snapdragon (Ubuntu package): before 4.15.0-1096.105

linux-image-4.15.0-1085-kvm (Ubuntu package): before 4.15.0-1085.87

linux-image-4.15.0-1079-raspi2 (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1079-gke (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1012-dell300x (Ubuntu package): before 4.15.0-1012.16

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4749-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Null pointer dereference

EUVDB-ID: #VU95192

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-27830

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

A vulnerability was found in Linux Kernel where in the spk_ttyio_receive_buf2() function, it would dereference spk_ttyio_synth without checking whether it is NULL or not, and may lead to a NULL-ptr deref crash.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 18.04

linux-image-azure (Ubuntu package): before 4.15.0.1108.81

linux-image-4.15.0-1108-azure (Ubuntu package): before 4.15.0-1108.120~14.04.1

linux-image-virtual-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-oem (Ubuntu package): before 4.15.0.136.132

linux-image-lowlatency-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-lpae-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-4.15.0-136-lowlatency (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic-lpae (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-oracle (Ubuntu package): before 4.15.0.1065.53

linux-image-gke (Ubuntu package): before 4.15.0.1079.83

linux-image-gcp (Ubuntu package): before 4.15.0.1093.94

linux-image-aws-hwe (Ubuntu package): before 4.15.0.1094.87

linux-image-4.15.0-1094-aws (Ubuntu package): before 4.15.0-1094.101~16.04.1

linux-image-4.15.0-1093-gcp (Ubuntu package): before 4.15.0-1093.106~16.04.1

linux-image-4.15.0-1065-oracle (Ubuntu package): before 4.15.0-1065.73~16.04.1

linux-image-virtual (Ubuntu package): before 4.15.0.136.123

linux-image-snapdragon (Ubuntu package): before 4.15.0.1096.99

linux-image-raspi2 (Ubuntu package): before 4.15.0.1079.76

linux-image-oracle-lts-18.04 (Ubuntu package): before 4.15.0.1065.75

linux-image-lowlatency (Ubuntu package): before 4.15.0.136.123

linux-image-kvm (Ubuntu package): before 4.15.0.1085.81

linux-image-gke-4.15 (Ubuntu package): before 4.15.0.1079.83

linux-image-generic-lpae (Ubuntu package): before 4.15.0.136.123

linux-image-generic (Ubuntu package): before 4.15.0.136.123

linux-image-gcp-lts-18.04 (Ubuntu package): before 4.15.0.1093.111

linux-image-dell300x (Ubuntu package): before 4.15.0.1012.14

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1108.81

linux-image-aws-lts-18.04 (Ubuntu package): before 4.15.0.1094.97

linux-image-4.15.0-1096-snapdragon (Ubuntu package): before 4.15.0-1096.105

linux-image-4.15.0-1085-kvm (Ubuntu package): before 4.15.0-1085.87

linux-image-4.15.0-1079-raspi2 (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1079-gke (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1012-dell300x (Ubuntu package): before 4.15.0-1012.16

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4749-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Release of invalid pointer or reference

EUVDB-ID: #VU92422

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-28941

CWE-ID: CWE-763 - Release of invalid pointer or reference

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to release of invalid pointer or reference error within the makefile. A local user can perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 18.04

linux-image-azure (Ubuntu package): before 4.15.0.1108.81

linux-image-4.15.0-1108-azure (Ubuntu package): before 4.15.0-1108.120~14.04.1

linux-image-virtual-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-oem (Ubuntu package): before 4.15.0.136.132

linux-image-lowlatency-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-lpae-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-4.15.0-136-lowlatency (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic-lpae (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-oracle (Ubuntu package): before 4.15.0.1065.53

linux-image-gke (Ubuntu package): before 4.15.0.1079.83

linux-image-gcp (Ubuntu package): before 4.15.0.1093.94

linux-image-aws-hwe (Ubuntu package): before 4.15.0.1094.87

linux-image-4.15.0-1094-aws (Ubuntu package): before 4.15.0-1094.101~16.04.1

linux-image-4.15.0-1093-gcp (Ubuntu package): before 4.15.0-1093.106~16.04.1

linux-image-4.15.0-1065-oracle (Ubuntu package): before 4.15.0-1065.73~16.04.1

linux-image-virtual (Ubuntu package): before 4.15.0.136.123

linux-image-snapdragon (Ubuntu package): before 4.15.0.1096.99

linux-image-raspi2 (Ubuntu package): before 4.15.0.1079.76

linux-image-oracle-lts-18.04 (Ubuntu package): before 4.15.0.1065.75

linux-image-lowlatency (Ubuntu package): before 4.15.0.136.123

linux-image-kvm (Ubuntu package): before 4.15.0.1085.81

linux-image-gke-4.15 (Ubuntu package): before 4.15.0.1079.83

linux-image-generic-lpae (Ubuntu package): before 4.15.0.136.123

linux-image-generic (Ubuntu package): before 4.15.0.136.123

linux-image-gcp-lts-18.04 (Ubuntu package): before 4.15.0.1093.111

linux-image-dell300x (Ubuntu package): before 4.15.0.1012.14

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1108.81

linux-image-aws-lts-18.04 (Ubuntu package): before 4.15.0.1094.97

linux-image-4.15.0-1096-snapdragon (Ubuntu package): before 4.15.0-1096.105

linux-image-4.15.0-1085-kvm (Ubuntu package): before 4.15.0-1085.87

linux-image-4.15.0-1079-raspi2 (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1079-gke (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1012-dell300x (Ubuntu package): before 4.15.0-1012.16

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4749-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Race condition

EUVDB-ID: #VU63812

Risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-29374

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to a race condition in the mm/gup.c and mm/huge_memory.c in Linux kernel. A local user can exploit the race and gain unauthorized access to sensitive information.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 18.04

linux-image-azure (Ubuntu package): before 4.15.0.1108.81

linux-image-4.15.0-1108-azure (Ubuntu package): before 4.15.0-1108.120~14.04.1

linux-image-virtual-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-oem (Ubuntu package): before 4.15.0.136.132

linux-image-lowlatency-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-lpae-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-4.15.0-136-lowlatency (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic-lpae (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-oracle (Ubuntu package): before 4.15.0.1065.53

linux-image-gke (Ubuntu package): before 4.15.0.1079.83

linux-image-gcp (Ubuntu package): before 4.15.0.1093.94

linux-image-aws-hwe (Ubuntu package): before 4.15.0.1094.87

linux-image-4.15.0-1094-aws (Ubuntu package): before 4.15.0-1094.101~16.04.1

linux-image-4.15.0-1093-gcp (Ubuntu package): before 4.15.0-1093.106~16.04.1

linux-image-4.15.0-1065-oracle (Ubuntu package): before 4.15.0-1065.73~16.04.1

linux-image-virtual (Ubuntu package): before 4.15.0.136.123

linux-image-snapdragon (Ubuntu package): before 4.15.0.1096.99

linux-image-raspi2 (Ubuntu package): before 4.15.0.1079.76

linux-image-oracle-lts-18.04 (Ubuntu package): before 4.15.0.1065.75

linux-image-lowlatency (Ubuntu package): before 4.15.0.136.123

linux-image-kvm (Ubuntu package): before 4.15.0.1085.81

linux-image-gke-4.15 (Ubuntu package): before 4.15.0.1079.83

linux-image-generic-lpae (Ubuntu package): before 4.15.0.136.123

linux-image-generic (Ubuntu package): before 4.15.0.136.123

linux-image-gcp-lts-18.04 (Ubuntu package): before 4.15.0.1093.111

linux-image-dell300x (Ubuntu package): before 4.15.0.1012.14

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1108.81

linux-image-aws-lts-18.04 (Ubuntu package): before 4.15.0.1094.97

linux-image-4.15.0-1096-snapdragon (Ubuntu package): before 4.15.0-1096.105

linux-image-4.15.0-1085-kvm (Ubuntu package): before 4.15.0-1085.87

linux-image-4.15.0-1079-raspi2 (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1079-gke (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1012-dell300x (Ubuntu package): before 4.15.0-1012.16

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4749-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

6) Buffer overflow

EUVDB-ID: #VU52772

Risk: Low

CVSSv4.0: 5.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/U:Clear]

CVE-ID: CVE-2020-29568

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a local authenticated user to a crash the entire system.

An issue was discovered in Xen through 4.14.x. Some OSes (such as Linux, FreeBSD, and NetBSD) are processing watch events using a single thread. If the events are received faster than the thread is able to handle, they will get queued. As the queue is unbounded, a guest may be able to trigger an OOM in the backend. All systems with a FreeBSD, Linux, or NetBSD (any version) dom0 are vulnerable.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 18.04

linux-image-azure (Ubuntu package): before 4.15.0.1108.81

linux-image-4.15.0-1108-azure (Ubuntu package): before 4.15.0-1108.120~14.04.1

linux-image-virtual-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-oem (Ubuntu package): before 4.15.0.136.132

linux-image-lowlatency-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-lpae-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-4.15.0-136-lowlatency (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic-lpae (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-oracle (Ubuntu package): before 4.15.0.1065.53

linux-image-gke (Ubuntu package): before 4.15.0.1079.83

linux-image-gcp (Ubuntu package): before 4.15.0.1093.94

linux-image-aws-hwe (Ubuntu package): before 4.15.0.1094.87

linux-image-4.15.0-1094-aws (Ubuntu package): before 4.15.0-1094.101~16.04.1

linux-image-4.15.0-1093-gcp (Ubuntu package): before 4.15.0-1093.106~16.04.1

linux-image-4.15.0-1065-oracle (Ubuntu package): before 4.15.0-1065.73~16.04.1

linux-image-virtual (Ubuntu package): before 4.15.0.136.123

linux-image-snapdragon (Ubuntu package): before 4.15.0.1096.99

linux-image-raspi2 (Ubuntu package): before 4.15.0.1079.76

linux-image-oracle-lts-18.04 (Ubuntu package): before 4.15.0.1065.75

linux-image-lowlatency (Ubuntu package): before 4.15.0.136.123

linux-image-kvm (Ubuntu package): before 4.15.0.1085.81

linux-image-gke-4.15 (Ubuntu package): before 4.15.0.1079.83

linux-image-generic-lpae (Ubuntu package): before 4.15.0.136.123

linux-image-generic (Ubuntu package): before 4.15.0.136.123

linux-image-gcp-lts-18.04 (Ubuntu package): before 4.15.0.1093.111

linux-image-dell300x (Ubuntu package): before 4.15.0.1012.14

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1108.81

linux-image-aws-lts-18.04 (Ubuntu package): before 4.15.0.1094.97

linux-image-4.15.0-1096-snapdragon (Ubuntu package): before 4.15.0-1096.105

linux-image-4.15.0-1085-kvm (Ubuntu package): before 4.15.0-1085.87

linux-image-4.15.0-1079-raspi2 (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1079-gke (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1012-dell300x (Ubuntu package): before 4.15.0-1012.16

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4749-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

7) Buffer overflow

EUVDB-ID: #VU52771

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-29568

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a local authenticated user to a crash the entire system.

An issue was discovered in Xen through 4.14.x. Some OSes (such as Linux, FreeBSD, and NetBSD) are processing watch events using a single thread. If the events are received faster than the thread is able to handle, they will get queued. As the queue is unbounded, a guest may be able to trigger an OOM in the backend. All systems with a FreeBSD, Linux, or NetBSD (any version) dom0 are vulnerable.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 18.04

linux-image-azure (Ubuntu package): before 4.15.0.1108.81

linux-image-4.15.0-1108-azure (Ubuntu package): before 4.15.0-1108.120~14.04.1

linux-image-virtual-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-oem (Ubuntu package): before 4.15.0.136.132

linux-image-lowlatency-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-lpae-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-4.15.0-136-lowlatency (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic-lpae (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-oracle (Ubuntu package): before 4.15.0.1065.53

linux-image-gke (Ubuntu package): before 4.15.0.1079.83

linux-image-gcp (Ubuntu package): before 4.15.0.1093.94

linux-image-aws-hwe (Ubuntu package): before 4.15.0.1094.87

linux-image-4.15.0-1094-aws (Ubuntu package): before 4.15.0-1094.101~16.04.1

linux-image-4.15.0-1093-gcp (Ubuntu package): before 4.15.0-1093.106~16.04.1

linux-image-4.15.0-1065-oracle (Ubuntu package): before 4.15.0-1065.73~16.04.1

linux-image-virtual (Ubuntu package): before 4.15.0.136.123

linux-image-snapdragon (Ubuntu package): before 4.15.0.1096.99

linux-image-raspi2 (Ubuntu package): before 4.15.0.1079.76

linux-image-oracle-lts-18.04 (Ubuntu package): before 4.15.0.1065.75

linux-image-lowlatency (Ubuntu package): before 4.15.0.136.123

linux-image-kvm (Ubuntu package): before 4.15.0.1085.81

linux-image-gke-4.15 (Ubuntu package): before 4.15.0.1079.83

linux-image-generic-lpae (Ubuntu package): before 4.15.0.136.123

linux-image-generic (Ubuntu package): before 4.15.0.136.123

linux-image-gcp-lts-18.04 (Ubuntu package): before 4.15.0.1093.111

linux-image-dell300x (Ubuntu package): before 4.15.0.1012.14

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1108.81

linux-image-aws-lts-18.04 (Ubuntu package): before 4.15.0.1094.97

linux-image-4.15.0-1096-snapdragon (Ubuntu package): before 4.15.0-1096.105

linux-image-4.15.0-1085-kvm (Ubuntu package): before 4.15.0-1085.87

linux-image-4.15.0-1079-raspi2 (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1079-gke (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1012-dell300x (Ubuntu package): before 4.15.0-1012.16

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4749-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

8) Unchecked Return Value

EUVDB-ID: #VU56816

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-29569

CWE-ID: CWE-252 - Unchecked Return Value

Exploit availability: No

Description

The vulnerability allows a local user to compromise the target system.

The vulnerability exists due to an unchecked return value. A local user can cause a denial of service (DoS) condition, leading to privilege escalation and information leaks.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 18.04

linux-image-azure (Ubuntu package): before 4.15.0.1108.81

linux-image-4.15.0-1108-azure (Ubuntu package): before 4.15.0-1108.120~14.04.1

linux-image-virtual-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-oem (Ubuntu package): before 4.15.0.136.132

linux-image-lowlatency-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-lpae-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-4.15.0-136-lowlatency (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic-lpae (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-oracle (Ubuntu package): before 4.15.0.1065.53

linux-image-gke (Ubuntu package): before 4.15.0.1079.83

linux-image-gcp (Ubuntu package): before 4.15.0.1093.94

linux-image-aws-hwe (Ubuntu package): before 4.15.0.1094.87

linux-image-4.15.0-1094-aws (Ubuntu package): before 4.15.0-1094.101~16.04.1

linux-image-4.15.0-1093-gcp (Ubuntu package): before 4.15.0-1093.106~16.04.1

linux-image-4.15.0-1065-oracle (Ubuntu package): before 4.15.0-1065.73~16.04.1

linux-image-virtual (Ubuntu package): before 4.15.0.136.123

linux-image-snapdragon (Ubuntu package): before 4.15.0.1096.99

linux-image-raspi2 (Ubuntu package): before 4.15.0.1079.76

linux-image-oracle-lts-18.04 (Ubuntu package): before 4.15.0.1065.75

linux-image-lowlatency (Ubuntu package): before 4.15.0.136.123

linux-image-kvm (Ubuntu package): before 4.15.0.1085.81

linux-image-gke-4.15 (Ubuntu package): before 4.15.0.1079.83

linux-image-generic-lpae (Ubuntu package): before 4.15.0.136.123

linux-image-generic (Ubuntu package): before 4.15.0.136.123

linux-image-gcp-lts-18.04 (Ubuntu package): before 4.15.0.1093.111

linux-image-dell300x (Ubuntu package): before 4.15.0.1012.14

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1108.81

linux-image-aws-lts-18.04 (Ubuntu package): before 4.15.0.1094.97

linux-image-4.15.0-1096-snapdragon (Ubuntu package): before 4.15.0-1096.105

linux-image-4.15.0-1085-kvm (Ubuntu package): before 4.15.0-1085.87

linux-image-4.15.0-1079-raspi2 (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1079-gke (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1012-dell300x (Ubuntu package): before 4.15.0-1012.16

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4749-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

9) Improper locking

EUVDB-ID: #VU57039

Risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-29660

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to double-locking error in drivers/tty/tty_io.c and drivers/tty/tty_jobctrl.c. An authenticated local user can exploit this vulnerability to perform a read-after-free attack against TIOCGSID and gain access to sensitive information.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 18.04

linux-image-azure (Ubuntu package): before 4.15.0.1108.81

linux-image-4.15.0-1108-azure (Ubuntu package): before 4.15.0-1108.120~14.04.1

linux-image-virtual-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-oem (Ubuntu package): before 4.15.0.136.132

linux-image-lowlatency-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-lpae-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-4.15.0-136-lowlatency (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic-lpae (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-oracle (Ubuntu package): before 4.15.0.1065.53

linux-image-gke (Ubuntu package): before 4.15.0.1079.83

linux-image-gcp (Ubuntu package): before 4.15.0.1093.94

linux-image-aws-hwe (Ubuntu package): before 4.15.0.1094.87

linux-image-4.15.0-1094-aws (Ubuntu package): before 4.15.0-1094.101~16.04.1

linux-image-4.15.0-1093-gcp (Ubuntu package): before 4.15.0-1093.106~16.04.1

linux-image-4.15.0-1065-oracle (Ubuntu package): before 4.15.0-1065.73~16.04.1

linux-image-virtual (Ubuntu package): before 4.15.0.136.123

linux-image-snapdragon (Ubuntu package): before 4.15.0.1096.99

linux-image-raspi2 (Ubuntu package): before 4.15.0.1079.76

linux-image-oracle-lts-18.04 (Ubuntu package): before 4.15.0.1065.75

linux-image-lowlatency (Ubuntu package): before 4.15.0.136.123

linux-image-kvm (Ubuntu package): before 4.15.0.1085.81

linux-image-gke-4.15 (Ubuntu package): before 4.15.0.1079.83

linux-image-generic-lpae (Ubuntu package): before 4.15.0.136.123

linux-image-generic (Ubuntu package): before 4.15.0.136.123

linux-image-gcp-lts-18.04 (Ubuntu package): before 4.15.0.1093.111

linux-image-dell300x (Ubuntu package): before 4.15.0.1012.14

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1108.81

linux-image-aws-lts-18.04 (Ubuntu package): before 4.15.0.1094.97

linux-image-4.15.0-1096-snapdragon (Ubuntu package): before 4.15.0-1096.105

linux-image-4.15.0-1085-kvm (Ubuntu package): before 4.15.0-1085.87

linux-image-4.15.0-1079-raspi2 (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1079-gke (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1012-dell300x (Ubuntu package): before 4.15.0-1012.16

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4749-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

10) Improper locking

EUVDB-ID: #VU51543

Risk: Low

CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2020-29661

CWE-ID: CWE-667 - Improper Locking

Exploit availability: Yes

Description

The vulnerability allows a local user to perform a escalate privileges on the system.

The vulnerability exists due to locking error in the tty subsystem of the Linux kernel in drivers/tty/tty_jobctrl.c. An local user can exploit this vulnerability to trigger a use-after-free error against TIOCSPGRP and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 14.04 - 18.04

linux-image-azure (Ubuntu package): before 4.15.0.1108.81

linux-image-4.15.0-1108-azure (Ubuntu package): before 4.15.0-1108.120~14.04.1

linux-image-virtual-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-oem (Ubuntu package): before 4.15.0.136.132

linux-image-lowlatency-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-lpae-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-generic-hwe-16.04 (Ubuntu package): before 4.15.0.136.132

linux-image-4.15.0-136-lowlatency (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic-lpae (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-4.15.0-136-generic (Ubuntu package): before 4.15.0-136.140~16.04.1

linux-image-oracle (Ubuntu package): before 4.15.0.1065.53

linux-image-gke (Ubuntu package): before 4.15.0.1079.83

linux-image-gcp (Ubuntu package): before 4.15.0.1093.94

linux-image-aws-hwe (Ubuntu package): before 4.15.0.1094.87

linux-image-4.15.0-1094-aws (Ubuntu package): before 4.15.0-1094.101~16.04.1

linux-image-4.15.0-1093-gcp (Ubuntu package): before 4.15.0-1093.106~16.04.1

linux-image-4.15.0-1065-oracle (Ubuntu package): before 4.15.0-1065.73~16.04.1

linux-image-virtual (Ubuntu package): before 4.15.0.136.123

linux-image-snapdragon (Ubuntu package): before 4.15.0.1096.99

linux-image-raspi2 (Ubuntu package): before 4.15.0.1079.76

linux-image-oracle-lts-18.04 (Ubuntu package): before 4.15.0.1065.75

linux-image-lowlatency (Ubuntu package): before 4.15.0.136.123

linux-image-kvm (Ubuntu package): before 4.15.0.1085.81

linux-image-gke-4.15 (Ubuntu package): before 4.15.0.1079.83

linux-image-generic-lpae (Ubuntu package): before 4.15.0.136.123

linux-image-generic (Ubuntu package): before 4.15.0.136.123

linux-image-gcp-lts-18.04 (Ubuntu package): before 4.15.0.1093.111

linux-image-dell300x (Ubuntu package): before 4.15.0.1012.14

linux-image-azure-lts-18.04 (Ubuntu package): before 4.15.0.1108.81

linux-image-aws-lts-18.04 (Ubuntu package): before 4.15.0.1094.97

linux-image-4.15.0-1096-snapdragon (Ubuntu package): before 4.15.0-1096.105

linux-image-4.15.0-1085-kvm (Ubuntu package): before 4.15.0-1085.87

linux-image-4.15.0-1079-raspi2 (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1079-gke (Ubuntu package): before 4.15.0-1079.84

linux-image-4.15.0-1012-dell300x (Ubuntu package): before 4.15.0-1012.16

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4749-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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